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khushailawadip9dkn2
22.03.2020 •
Physics
A rubber band has a spring constant of 15 N/m. If you stretch it by 0.3 m,
what is the magnitude of the force that resists the stretching?
O
A. 6.2 N
B. 4.5N
O C. 5.0 N
O D. 3.0N
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Ответ:
B. 4.5N
Explanation:
F = kx
Where
F = force
K = spring constant
x = compression
Given
K = 15N/m
x = 0.3m
Therefore
F = 15 x 0.3
F = 4.5N
The magnitude of the force that resists the stretching is 4.5N
Ответ:
The water vapor will have the greatest entropy at the triple point
Explanation:
At the triple point of water, which has the properties of 0.0075°C temperature and 6.11657 mbar pressure, solid ice, liquid water and water vapor exist together in a location
According to Professor Stephen Lower on LibreTexts website entropy is a measure the extent to which thermal energy is shared and spread in a system
The change in entropy, ΔS = ΔH/T
The heat change in
= 6.01 kJ/mol
The heat change in vaporization,
= 45.05 kJ/mol
The heat change in sublimation,
= 51.06 kJ/mol
Therefore, the entropy of the water vapor
> The entropy of liquid water,
> The entropy of the solid ice, ![S_{Solid \, ice}](/tpl/images/1159/2819/a036f.png)
The portion with the highest entropy at the triple point is the water vapor
The water vapor will have the greatest entropy at the triple point